U.S. patent application number 17/078738 was filed with the patent office on 2021-02-11 for signal transmission method, communication device and storage medium.
This patent application is currently assigned to GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.. The applicant listed for this patent is GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD.. Invention is credited to Zhihua SHI.
Application Number | 20210045155 17/078738 |
Document ID | / |
Family ID | 1000005198773 |
Filed Date | 2021-02-11 |
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United States Patent
Application |
20210045155 |
Kind Code |
A1 |
SHI; Zhihua |
February 11, 2021 |
SIGNAL TRANSMISSION METHOD, COMMUNICATION DEVICE AND STORAGE
MEDIUM
Abstract
A signal transmission method, a communication device and a
storage medium are provided. The signal transmission method
includes operations as follows. A channel detection window and a
signal transmission window are determined. The channel detection
window is located before the signal transmission window, the
channel detection window comprises N sub-detection windows, the
signal transmission window comprises M sub-transmission resources,
a first sub-detection window in the N sub-detection windows
corresponds to a first sub-transmission resource in the M
sub-transmission resources, N is greater than or equal to 2, and M
is greater than or equal to 2. Channel detection is performed in
the first sub-detection window. If a channel detection result in
the first sub-detection window indicates that a channel is idle, a
target signal is transmitted in the first sub-transmission
resource.
Inventors: |
SHI; Zhihua; (Dongguan,
CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP., LTD. |
Dongguan |
|
CN |
|
|
Assignee: |
GUANGDONG OPPO MOBILE
TELECOMMUNICATIONS CORP., LTD.
Dongguan
CN
|
Family ID: |
1000005198773 |
Appl. No.: |
17/078738 |
Filed: |
October 23, 2020 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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PCT/CN2018/084472 |
Apr 25, 2018 |
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17078738 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04W 74/0808
20130101 |
International
Class: |
H04W 74/08 20060101
H04W074/08 |
Claims
1. A method for signal transmission, comprising: determining a
channel detection window and a signal transmission window, the
channel detection window being located before the signal
transmission window in time domain, wherein the channel detection
window comprises N sub-detection windows, and the signal
transmission window comprises M sub-transmission resources, a first
sub-detection window of the N sub-detection windows corresponds to
a first sub-transmission resource of the M sub-transmission
resources, N and M are positive integers, N.gtoreq.2 and
M.gtoreq.2; performing channel detection in the first sub-detection
window; and transmitting a target signal in the first
sub-transmission resource in response to that a result of the
channel detection in the first sub-detection window indicates that
a channel is idle.
2. The method of claim 1, wherein M=N, the first sub-detection
window is an i-th sub-detection window of the N sub-detection
windows arranged in chronological order, the first sub-transmission
resource is an i-th sub-transmission resource of the M
sub-transmission resources arranged in chronological order, i is a
positive integer, and 1.ltoreq.i.ltoreq.N.
3. The method of claim 1, wherein M=N, the first sub-detection
window is an i-th sub-detection window of the N sub-detection
windows arranged in chronological order, and the first
sub-transmission resource is an i-th sub-transmission resource of
the M sub-transmission resources arranged in reverse chronological
order, i is a positive integer and 1.ltoreq.i.ltoreq.N.
4. The method of claim 1, wherein the N sub-detection windows are
continuous in the time domain.
5. The method of claim 1, wherein the M sub-transmission resources
comprises a second sub-transmission resource adjacent to the first
sub-transmission resource, and the first sub-transmission resource
and the second sub-transmission resource are continuous or
discontinuous in the time domain.
6. The method of claim 5, wherein the first sub-transmission
resource and the second sub-transmission resource are discontinuous
in the time domain, and the second sub-transmission resource is
located before the first sub-transmission resource in the time
domain, the method further comprises: transmitting a padding signal
in a time interval between the second sub-transmission resource and
the first sub-transmission resource, wherein the padding signal and
the target signal use a same precoding.
7. The method of claim 1, wherein the performing channel detection
in the first sub-detection window comprises: performing channel
detection on a channel in a first direction in the first
sub-detection window; the transmitting the target signal in the
first sub-transmission resource in response to that a result of the
channel detection in the first sub-detection window indicates that
the channel is idle comprises: transmitting the target signal on
the first sub-transmission resource in the first direction in
response to that a result of the channel detection on the channel
in the first direction in the first sub-detection window indicates
that the channel is idle.
8. The method of claim 1, wherein the target signal is not
transmitted in the first sub-transmission resource in response to
that the result of the channel detection in the first sub-detection
window indicates that the channel is occupied.
9. The method of claim 1, wherein the target signal is one of
signals as follows: a synchronization signal block SSB, a channel
state indication reference signal CSI-RS and a sounding reference
signal SRS.
10. The method of claim 1, wherein the method for signal
transmission is performed by a network device or a terminal
device.
11. A communication device, comprising a processor, wherein the
processor is configured to call instructions stored in a memory to
implement: determining a channel detection window and a signal
transmission window, the channel detection window being located
before the signal transmission window in time domain, wherein the
channel detection window comprises N sub-detection windows, and the
signal transmission window comprises M sub-transmission resources,
a first sub-detection window of the N sub-detection windows
corresponds to a first sub-transmission resource of the M
sub-transmission resources, N and M are positive integers,
N.gtoreq.2 and M.gtoreq.2; performing channel detection in the
first sub-detection window; and transmitting a target signal in the
first sub-transmission resource in response to that a result of the
channel detection in the first sub-detection window indicates that
a channel is idle.
12. The communication device of claim 11, wherein M=N, the first
sub-detection window is an i-th sub-detection window of the N
sub-detection windows arranged in chronological order, the first
sub-transmission resource is an i-th sub-transmission resource of
the M sub-transmission resources arranged in chronological order, i
is a positive integer, and 1.ltoreq.i.ltoreq.N.
13. The communication device of claim 11, wherein M=N, the first
sub-detection window is an i-th sub-detection window of the N
sub-detection windows arranged in chronological order, and the
first sub-transmission resource is an i-th sub-transmission
resource of the M sub-transmission resources arranged in reverse
chronological order, i is a positive integer and
1.ltoreq.i.ltoreq.N.
14. The communication device of claim 11, wherein the N
sub-detection windows are continuous in the time domain.
15. The communication device of claim 11, wherein the M
sub-transmission resources comprises a second sub-transmission
resource adjacent to the first sub-transmission resource, and the
first sub-transmission resource and the second sub-transmission
resource are continuous or discontinuous in the time domain.
16. The communication device of claim 15, wherein the first
sub-transmission resource and the second sub-transmission resource
are discontinuous in the time domain, and the second
sub-transmission resource is located before the first
sub-transmission resource in the time domain, the processor is
further configured to call the instructions stored in the memory to
implement: transmitting a padding signal in a time interval between
the second sub-transmission resource and the first sub-transmission
resource, wherein the padding signal and the target signal use a
same precoding.
17. The communication device of claim 11, wherein the processor is
further configured to call the instructions stored in the memory to
implement: performing channel detection on a channel in a first
direction in the first sub-detection window, wherein the processor
is further configured to call the instructions stored in the memory
to implement: transmitting the target signal on the first
sub-transmission resource in the first direction in response to
that a result of the channel detection on the channel in the first
direction in the first sub-detection window indicates that the
channel is idle.
18. The communication device of claim 11, wherein the target signal
is not transmitted in the first sub-transmission resource in
response to that the result of the channel detection in the first
sub-detection window indicates that the channel is occupied.
19. The communication device of claim 11, wherein the target signal
is one of signals as follows: a synchronization signal block SSB, a
channel state indication reference signal CSI-RS and a sounding
reference signal SRS.
20. A non-transitory storage medium having stored thereon a
computer program, wherein the computer program, when executed by a
computing device, enables the storage medium to implement:
determining a channel detection window and a signal transmission
window, the channel detection window being located before the
signal transmission window in time domain, wherein the channel
detection window comprises N sub-detection windows, and the signal
transmission window comprises M sub-transmission resources, a first
sub-detection window of the N sub-detection windows corresponds to
a first sub-transmission resource of the M sub-transmission
resources, N and M are positive integers, N.gtoreq.2 and
M.gtoreq.2; performing channel detection in the first sub-detection
window; and transmitting a target signal in the first
sub-transmission resource in response to that a result of the
channel detection in the first sub-detection window indicates that
a channel is idle.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This is a continuation application of International Patent
Application No. PCT/CN2018/084472, filed on Apr. 25, 2018, the
disclosure of which is hereby incorporated by reference in its
entirety.
BACKGROUND
[0002] A New Radio (NR) system supports data transmission on
unlicensed frequency bands. Communication of the communication
device on unlicensed frequency bands should be based on the
principle of Listen Before Talk (LBT), that is, the communication
device needs to perform channel detection (or channel sensing)
before transmitting signals on the channels of the unlicensed
frequency spectrum. Only when a result of the channel detection
indicates that the channel is idle, the communication device can
transmit a signal. If the result of the channel detection on the
unlicensed frequency spectrum by the communication device indicates
that the channel is occupied (that is, the channel is busy), the
communication device cannot transmits a signal.
[0003] When multiple signals are required to be transmitted
continuously, there is no time interval for channel detection
between the multiple signals, or the time interval is not
sufficient to perform channel detection. In this case, how to
perform channel detection of multiple continuous signals to be
transmitted has become an urgent problem to be solved.
SUMMARY
[0004] The embodiments of the disclosure relate to the field of
wireless communication, and more specifically to a method for
signal transmission, a communication device and a storage
medium.
[0005] A first aspect of the embodiments of the disclosure provides
a method for signal transmission, which may include operations as
follows. A channel detection window and a signal transmission
window are determined, and the channel detection window is located
before the signal transmission window in the time domain. The
channel detection window includes N sub-detection windows, and the
signal transmission window includes M sub-transmission resources. A
first sub-detection window of the N sub-detection windows
corresponds to a first sub-transmission resource of the M
sub-transmission resources. N and M are positive integers, and
N.gtoreq.2, M.gtoreq.2. Channel detection is performed in the first
sub-detection window, and in response to that a result of the
channel detection in the first sub-detection window indicates that
the channel is idle, a target signal is transmitted in the first
sub-transmission resource.
[0006] A second aspect of the embodiments of the disclosure
provides a communication device, which includes a processor and a
memory. The memory is used to store a computer program, and the
processor is used to call and run the computer program stored in
the memory, to execute operations as follows. A channel detection
window and a signal transmission window are determined, and the
channel detection window is located before the signal transmission
window in the time domain. The channel detection window includes N
sub-detection windows, and the signal transmission window includes
M sub-transmission resources. A first sub-detection window of the N
sub-detection windows corresponds to a first sub-transmission
resource of the M sub-transmission resources. N and M are positive
integers, and N.gtoreq.2, M.gtoreq.2. Channel detection is
performed in the first sub-detection window, and in response to
that a result of the channel detection in the first sub-detection
window indicates that the channel is idle, a target signal is
transmitted in the first sub-transmission resource.
[0007] A third aspect of the embodiments of the disclosure provides
a computer-readable storage medium for storing a computer program
that enables a computer to perform the method in the first
aspect.
BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 is a schematic diagram of a possible wireless
communication system to which an embodiment of the disclosure is
applied.
[0009] FIG. 2 is a schematic diagram of DRS transmission in a
communication system.
[0010] FIG. 3 is a schematic diagram of SSB transmission in a
communication system.
[0011] FIG. 4 is a schematic flowchart of a method for signal
transmission according to an embodiment of the disclosure.
[0012] FIG. 5 is a schematic diagram of a channel detection window
and a signal transmission window according to an embodiment of the
disclosure.
[0013] FIG. 6 is a schematic block diagram of a communication
device according to an embodiment of the disclosure.
[0014] FIG. 7 is a schematic structural diagram of a communication
device according to an embodiment of the disclosure.
[0015] FIG. 8 is a schematic structural diagram of a chip according
to an embodiment of the disclosure.
DETAILED DESCRIPTION
[0016] The technical solutions of the embodiments of the disclosure
can be applied to various communication systems, such as a Global
System of Mobile Communication (GSM) system, a Code Division
Multiple Access (CDMA) system, a Wideband Code Division Multiple
Access (WCDMA) system, a General Packet Radio Service (GPRS), a
Long Term Evolution (LTE) system, a LTE Frequency Division Duplex
(FDD) system, a LTE Time Division Duplex (TDD) system, an Advanced
long term evolution (LTE-A) system, a New Radio (NR) system, a NR
system evolution system, a LTE-based access to unlicensed spectrum
(LTE-U) system, a NR-based access to unlicensed spectrum (NR-U)
system, a Universal Mobile Telecommunication System (UMTS), a
Worldwide Interoperability for Microwave Access (WiMAX)
communication system, a Wireless Local Area Networks (WLAN), a
Wireless Fidelity (WiFi), a next-generation communication systems
or other communication systems, etc.
[0017] Generally, traditional communication systems support a
limited number of connections and are easy to be implemented.
However, with the development of communication technology, mobile
communication systems will not only support traditional
communication, but also support, for example, device to device
(D2D) communication, machine to machine (M2M) communication,
machine type Communication (MTC), and vehicle to vehicle (V2V)
communication, etc. The embodiments of the disclosure can also be
applied to these communication systems.
[0018] Optionally, the communication system in the embodiment of
the disclosure may be applied to a carrier aggregation (CA)
scenario, a dual connectivity (DC) scenario, or a standalone (SA)
configuration scenario.
[0019] The embodiments of the disclosure do not limit the applied
frequency spectrum. For example, the embodiments of the disclosure
may be applied to a licensed spectrum or an unlicensed
spectrum.
[0020] FIG. 1 shows a possible wireless communication system 100 to
which the embodiments of the disclosure are applied. The wireless
communication system 100 may include a network device 110. The
network device 110 may be a device that communicates with a
terminal device. The network device 110 can provide communication
coverage for a specific geographic area, and can communicate with
terminal devices located within the coverage. Optionally, the
network device 100 may be a base transceiver station (BTS) in a GSM
system or a CDMA system, or a NodeB (NB) in a WCDMA system, or an
evolutional Node B (eNB or eNodeB) in an LTE system, or a
network-side device in the NR system, or a wireless controller in
the cloud radio access network (CRAN). Alternatively, the network
device can be a relay station, an access point, an in-vehicle
device, a wearable device, a network-side device in next-generation
networks, or a network device in a future evolution public land
mobile networks (PLMN).
[0021] The wireless communication system 100 further includes at
least one terminal device 120 located within the coverage of the
network device 110. The terminal device 120 may be mobile or fixed.
Alternatively, the terminal device 120 may refer to an access
terminal, a user equipment (UE), a user unit, a user station, a
mobile station, a mobile terminal, a remote station, a remote
terminal, a mobile device, a user terminal, a terminal, a wireless
communication device, a user agent, or a user device. The access
terminal may be a cellular phone, a cordless phone, a session
initiation protocol (SIP) phone, a wireless local loop (WLL)
station, a personal digital processing (PDA), or a handheld device
having a wireless communication function, a computing device or
other processing device connected to a wireless modem, an
in-vehicle device, a wearable device, a terminal device in the
future SG network or a terminal device in future evolved PLMNs or
the like. Optionally, device to device (D2D) communication may also
be performed between the terminal devices 120.
[0022] Specifically, the network device 110 may provide a service
for the cell, and the terminal device 120 communicates with the
network device 110 through transmission resources (for example,
frequency domain resources or frequency spectrum resources) used by
the cell, and the cell may be a cell corresponding to the network
device 110 (for example, the base station). The cell may belong to
a macro base station or a base station corresponding to a small
cell. The small cell here may include: a metro cell, a micro cell,
a pico cell and a femto cell or the like. These small cells have
the characteristics of small coverage and low transmission power,
and are applicable for providing high-speed data transmission
services.
[0023] FIG. 1 exemplarily shows one network device and two terminal
devices. Optionally, the wireless communication system 100 may
include multiple network devices and each network device may
include terminal devices within the coverage, the number of which
is other than two, which is not limited in the embodiments of the
disclosure.
[0024] Optionally, the wireless communication system 100 may
further include other network entities such as a network controller
and a mobility management entity, which is not limited in the
embodiments of the disclosure.
[0025] Optionally, the downlink physical channel in the embodiments
of the disclosure may include a physical downlink control channel
(PDCCH), an enhanced physical downlink control channel (EPDCCH), a
physical downlink shared channel (PDSCH), a physical Hybrid ARQ
Indicator Channel (PHICH), a physical multicast channel (PMCH), a
physical broadcast channel (PBCH), or the like. The downlink
reference signal may include a downlink synchronization signal, a
phase tracking reference signal (PT-RS), a downlink DeModulation
reference signal (DMRS), and a channel state information reference
signal (CSI-RS) or the like. The downlink synchronization signal
may be used for a communication device access network and radio
resource management measurement, the downlink DMRS may be used for
demodulation of a downlink channel, the CSI-RS may be used for
measurement of the downlink channel, downlink time-frequency
synchronization or phase tracking, and the PT-RS may be used for
measurement of the downlink channel, downlink time-frequency
synchronization or phase tracking.
[0026] Optionally, the uplink physical channel in the embodiment of
the disclosure may include a physical random access channel
(PRACH), a physical uplink control channel (PUCCH), and a physical
uplink shared channel (PUSCH) or the like. The uplink reference
signal may include an uplink DeModulation reference signal (DMRS),
a sounding reference signal (SRS), a phase tracking reference
signal (PT-RS) or the like. The uplink DMRS may be used for
demodulation of an uplink channel, the SRS may be used for
measurement of the uplink channel, uplink time-frequency
synchronization or phase tracking, and the PT-RS may also be used
for measurement of the uplink channel, uplink time-frequency
synchronization or phase tracking.
[0027] It should be understood that the embodiments of the
disclosure may include physical channels or reference signals with
the same names and different functions as those described above,
and may also include physical channels or reference signals with
different names and the same functions as those described above,
which is not limited in the disclosure.
[0028] During transmission of downlink signals in the Licensed
Assisted Access-LTE (LAA-LTE) system, the network device needs to
transmit a discovery reference signal (DRS) on the unlicensed
frequency spectrum, so that the terminal device of the local cell
can implement synchronization with the cell on the unlicensed
frequency spectrum, and the terminal device of the neighboring cell
can implement measurement, such as the reference signal receiving
power (RSRP) or reference signal receiving quality (RSRQ), of the
radio resource management (RRM) of the signal of the local cell.
The DRS in the LTE system may include a primary synchronization
signal (PSS), a secondary synchronization signal (SSS) and a
cell-specific reference signal (CRS). Optionally, the DRS may
further include a Channel State Information Reference Signal
(CSI-RS). Taking the DRS including PSS, SSS and CRS as an example,
the transmission of the DRS in the LAA-LTE system is illustrated.
On the unlicensed frequency spectrum, after the network device
performs channel detection based on the LBT principle and obtains
the channel usage right, the DRS is transmitted in a discovery
signal measurement timing configuration (DMTC) window configured by
the network device for the terminal device.
[0029] As shown in FIG. 2, if a DRS is transmitted separately, that
is, if DRS is not transmitted with a channel such as a PDSCH, a
PDCCH or an EPDCCH, the network device performs a clear channel
assessment (CCA) detection with the length T.sub.des on the
unlicensed frequency spectrum before the starting of the DMTC
window. If a result of the detection indicates that the channel is
idle, the LBT is considered to be successful, and if the result of
the detection indicates that the channel is occupied, the LBT is
considered to be failed. Specifically, channel detection may refer
to collecting signal energy on a channel in a time slot. If the
energy value is greater than or equal to a preset threshold, the
channel is considered to be occupied, and if the energy value is
less than the preset threshold, the channel is considered to be
idle. If the LBT fails, the network device may perform CCA
detection of length of T.sub.des before the next subframe in the
DMTC window, and may transmit a DRS signal on the first subframe
where the LBT succeeds in the DMTC window. When a DRS is
transmitted on a subframe, the DRS occupies the first 12 symbols of
the subframe, the PSS and the SSS occupy symbol 6 and symbol 5, and
the CRS occupies symbol 0, symbol 4, symbol 7 and symbol 11.
[0030] When the NR technology is applied to the unlicensed
frequency spectrum, similar to the LAA-LTE system, a
synchronization signal block (SSB or SS Block) similar to the DRS
in the LAA-LTE system needs to be transmitted on the unlicensed
carrier. Unlike omnidirectional transmission of the DRS, the
network device may transmit the SSB in different directions, or may
transmit the SSB using different beams (each beam corresponds to a
direction, which may also be referred to a beam direction).
Correspondingly, before transmitting the SSB using one beam, a
channel in the beam direction needs to be detected to ensure that
the channel in the direction is available. However, in some
scenarios (such as high-frequency scenarios), there may be no time
interval between two adjacent SSBs or the time interval is not
large enough to implement channel detection. FIG. 3 shows a
schematic diagram of candidate transmission positions of an SSB in
cases that the subcarrier spacing is 120 KHz and 240 KHz.
[0031] In one possible implementation method, the network device
directly transmits a signal without performing channel detection,
and determines whether to perform next channel detection, that is,
Listen After Talk (IAT), according to a situation of a signal sent
by the network device and received by the terminal device. In this
method, since the terminal device needs to wait for feedback of the
terminal device, to determine whether to perform channel detection,
the feedback delay is large.
[0032] In an embodiment of the disclosure, a channel detection
window including multiple sub-detection windows are set, the
multiple sub-detection windows are used to perform channel
detection on multiple signals to be transmitted. The communication
device transmits the multiple signals on corresponding
sub-transmission resources in the signal transmission window after
the channel detection window based on a result of the detection,
thereby ensuring effective transmission of high-priority signals on
the premise of ensuring fairly using spectrum resources by the
communication systems on the unlicensed frequency spectrum.
[0033] FIG. 4 is a schematic flowchart of a method 400 for signal
transmission according to an embodiment of the disclosure. The
method described in FIG. 4 may be performed by a communication
device such as a network device or a terminal device. The terminal
device may be, for example, the terminal device 120 shown in FIG.
1, and the network device may be, for example, the network device
110 shown in FIG. 1. As shown in FIG. 4, the method 400 for signal
transmission may include a part or all of the following
operations.
[0034] At 410, a channel detection window and a signal transmission
window are determined, and the channel detection window is located
before the signal transmission window in the time domain.
[0035] The channel detection window includes N sub-detection
windows, and the signal transmission window includes M
sub-transmission resources. A first sub-detection window in the N
sub-detection windows corresponds to a first sub-transmission
resource in the M sub-transmission resources, N and M are positive
integers, and N.gtoreq.2, M.gtoreq.2.
[0036] At 420, channel detection is performed within the first
sub-detection window.
[0037] At 430, if a result of the channel detection in the first
sub-detection window indicates that the channel is idle, a target
signal is transmitted in the first sub-transmission resource.
[0038] Specifically, the communication device performs channel
detection in the signal detection window, and performs signal
transmission in the signal transmission window after the channel
detection window based on the result of the channel detection. The
channel detection window includes N sub-detection windows
(N.gtoreq.2), and the signal transmission window includes M
sub-transmission resources (M.gtoreq.2), M=N or M.noteq.N. There
are correspondences between the N sub-detection windows and the M
sub-transmission resources. For example, there are one-to-one
correspondences between the N sub-detection windows and the M
sub-transmission resources, or one sub-detection window corresponds
to one or more sub-transmission resources, or one sub-transmission
resource corresponds to one or more sub-detection windows, which is
not limited in this embodiment of the disclosure. Assumed that the
first sub-detection window of the N sub-detection windows
corresponds to the first sub-transmission resource of the M
sub-transmission resources, after the communication device performs
channel detection in the first sub-detection window, the
communication device may transmit a target signal in the first
sub-transmission resource if a result of the channel detection in
the first sub detection window indicates that the channel is idle.
In practical, optionally, if a result of the channel detection in
the first sub-detection window indicates that the channel is
occupied, the communication device does not transmit a target
signal in the first sub-transmission resource.
[0039] Therefore, the channel detection window includes multiple
sub-detection windows for respectively performing channel detection
on multiple signals to be transmitted, and the communication device
transmits multiple signals in the corresponding sub-transmission
resources in the signal transmission window after the channel
detection window based on the result of the detection, thereby
ensuring effective transmission of high-priority signals on the
premise of ensuring fairly using spectrum resources by the
communication systems on the unlicensed frequency spectrum.
[0040] It can be seen that even when there is no time interval for
channel detection between the transmission resources used by the
multiple signals to be transmitted or the time interval is not
enough to perform channel detection, the method described in the
embodiments of the disclosure can still effectively realize
effective channel detection for multiple consecutive signals.
[0041] Optionally, the communication device is a network device or
a terminal device.
[0042] Optionally, M=N, the first sub-detection window is an i-th
sub-detection window of the N sub-detection windows arranged in
chronological order, and the first sub-transmission resource is an
i-th sub-transmission resource of the M sub-transmission resources
arranged in chronological order, i is a positive integer, and
1.ltoreq.i.ltoreq.N.
[0043] Alternatively, optionally, M=N, the first sub-detection
window is an i-th sub-detection window of the N sub-detection
windows arranged in chronological order, and the first
sub-transmission resource is an i-th sub-transmission resource of
the M sub-transmissions resources arranged in chronological order,
i is a positive integer and 1.ltoreq.i.ltoreq.N.
[0044] In this embodiment, M=N, N sub-detection windows and M
sub-transmission resources have one-to-one correspondences in
chronological order. Specifically, the N sub-detection windows may
be arranged in chronological order (the first sub-detection window
to the N-th sub-detection window are sequentially arranged in
chronological order), and the M sub-transmission resources are
arranged in chronological order (the first sub-transmission
resource to the M-th sub-transmission resource are arranged
sequentially in chronological order). The first sub-detection
window corresponds to the first sub-transmission resource, the
second sub-detection window corresponds to the second
sub-transmission resource, . . . , the i-th sub-detection window
corresponds to the i-th sub-transmission resource, . . . , the N-th
sub-transmission window corresponds to the M-th sub-transmission
resource. Alternatively, the first sub-detection window corresponds
to the M-th sub-transmission resource, the second sub-detection
window corresponds to the (M-1)-th sub-transmission resource, . . .
, the i-th sub-detection window corresponds to the (M-i+1)-th
sub-transmission resource, . . . the Nth sub-detection window
corresponds to the first sub-transmission resource.
[0045] In practical, only two optional solutions are provided here,
and the embodiments of the disclosure are not limited thereto.
There may be other correspondences between the N sub-detection
windows and the M sub-transmission resources. For example, in a
case of M=N, the first sub-detection window is an i-th
sub-detection window of the N sub-detection windows arranged in
order of window size from large to small (or from small to large),
and the first sub-transmission resource is an i-th sub-transmission
resource of the M sub-transmission resources arranged in
chronological order (or in reverse chronological order).
[0046] Optionally, the N sub-detection windows are continuous in
the time domain.
[0047] Optionally, the N sub-detection windows further include a
second sub-detection window adjacent to the first sub-detection
window, and a relationship between the first sub-detection window
and the second sub-detection window in the time domain may be
continuous or discontinuous or partially overlapping.
[0048] Optionally, the M sub-transmission resources further include
a second sub-transmission resource adjacent to the first
sub-transmission resource, and the first sub-transmission resource
and the second sub-transmission resource are continuous or
discontinuous in the time domain.
[0049] Optionally, the M sub-transmission resources further include
a second sub-transmission resource adjacent to the first
sub-transmission resource, and the first sub-transmission resource
and the second sub-transmission resource partially overlap in the
time domain.
[0050] Optionally, the first sub-transmission resource and the
second sub-transmission resource are discontinuous in the time
domain, and the second sub-transmission resource is located before
the first sub-transmission resource in the time domain, the method
may further include an operation that a padding signal is
transmitted in a time interval between the second sub-transmission
resource and the first sub-transmission resource. The padding
signal and the target signal use the same precoding.
[0051] By way of example but not limitation, the padding signal and
the target signal using the same precoding includes the padding
signal and the target signal using the same analog precoding (or
using the same beam direction), and/or the padding signal and the
target signal using the same digital precoding (or the same
precoding matrix).
[0052] By way of example but not limitation, the padding signal and
the target signal using the same precoding includes the padding
signal and the target signal using the precoding as an identity
matrix, or in other words, the padding signal and the target signal
using no precoding.
[0053] Optionally, at 420, the operation that channel detection is
performed in the first sub-detection window includes an operation
that channel detection is performed on a channel in the first
direction in the first sub-detection window.
[0054] It should be understood that, in the embodiment of the
disclosure, the communication device performs channel detection on
the channel in the first direction to match signal transmission of
the communication device in the first direction. Therefore, channel
detection of the communication device on the channel in the first
direction includes a channel detection technology that enables the
communication device to determine whether the channel in the
direction is idle.
[0055] As an example but not a limitation, the communication device
collects signal energy in the first direction, and determines
whether the channel in the first direction is idle according to
whether the signal energy in the direction exceeds a preset
threshold.
[0056] As an example but not a limitation, the communication device
receives indication information sent by a target signal receiving
device to indicate whether the channel in the first direction is
idle, and determines whether the channel in the first direction is
idle according to the indication information.
[0057] Optionally, the target signal receiving device performs
channel detection on the channel in the first direction (for
example, the target signal receiving device collects signal energy
in the first direction, and determines a result of the channel
detection in the first direction according to whether the signal
energy in the direction exceeds a preset threshold), and transmits
the result of the channel detection to the communication device in
the first sub-detection window, the communication device receives
the result of the channel detection in the first sub-detection
window, and determines whether the channel in the first direction
is idle based on the result of the channel detection, thereby
performing channel detection on the channel in the first direction
within the first sub-detection window.
[0058] At 430, in response to that the result of the channel
detection in the first sub-detection window indicates that the
channel is idle, a target signal is transmitted in the first
sub-transmission resource includes an operation as follows. In
response to that the result of the channel detection on the channel
in the first direction within the first sub-detection window
indicates that the channel is idle, a target signal is transmitted
in the first sub-transmission resource in the first direction.
[0059] Specifically, the N sub-detection windows may be used to
perform channel detection on channels in different directions. For
example, the first sub-detection window is used to perform channel
detection on a channel in one direction (for example, the first
direction). In response to that the result of the channel detection
on the channel in the first direction in the first sub-detection
window indicates that the channel is idle, the target signal may be
transmitted on the first sub-transmission resource corresponding to
the first sub-detection window in the first direction. In
practical, optionally, in response to that the result of the
channel detection on the channel in the first direction in the
first sub-detection window indicates that the channel is occupied,
no target signal is transmitted in the first direction on the first
sub-transmission resource.
[0060] For another example, the first sub-detection window is used
to perform channel detection on channels in at least two directions
(for example, a second direction and a third direction). If each of
the results of the channel detection on the channels in the second
direction and the third direction in the first sub-detection window
indicates that the channel is idle, the communication device
transmits a target signal in at least one of the second and third
directions in the first sub-detection window. If the result of the
channel detection on the channel in one of the second direction and
the third direction in the first sub-detection window indicates
that the channel is idle, the communication device transmits a
target signal in the first sub-transmission resource in the
direction in which the channel is idle. If the results of the
channel detection on the channels in the second direction and the
third direction in the first sub-detection window indicate that
both the channels are occupied, no target signal is transmitted in
the second direction and the third direction on the first
sub-transmission resource.
[0061] In the embodiment of the disclosure, the target signal may
be, for example, at least one of an SSB, a CSI-RS, an SRS and other
signals. Alternatively, the target signal may be transmitted in at
least two directions, or the target signal may be transmitted by
using at least two beams.
[0062] In the embodiment of the disclosure, when the target signal
is an SSB, the target signal includes a PSS and an SSS. Optionally,
the target signal may further include one or more of a PBCH, a CRS,
and a CSI-RS.
[0063] In the embodiment of the disclosure, since a signal
detection window including multiple sub-detection windows is
provided, channel detection may be performed on the channels to be
transmitted in multiple directions in the multiple sub-detection
windows, the communication device may transmit a target signal such
as an SSB in a corresponding direction on a sub-transmission
resource corresponding to a sub-detection window in which a result
of the channel detection indicates that the channel is idle based
on the result of the channel detection, thereby ensuring that
channel detection can be performed before each SSB is transmitted,
and ensuring transmission of a high-priority SSB on the premise of
ensuring fairly using spectrum resources by the communication
systems on the unlicensed frequency spectrum.
[0064] For example, as shown in FIG. 5, taking M=N=5 as an example,
the channel detection window is located before the channel
transmission window, the channel detection window includes 5
sub-detection windows, the signal transmission window includes 5
sub-transmission resources, and 5 sub-detection windows have
one-to-one correspondences with the 5 sub-transmission resources.
The sub detection window 1 corresponds to the sub transmission
resource 1, the sub detection window 2 corresponds to the sub
transmission resource 2, the sub detection window 3 corresponds to
the sub transmission resource 3, the sub detection window 4
corresponds to the sub transmission resource 4, and the sub
detection window 5 corresponds to sub-transport resource 5. As
shown in FIG. 5, the communication device performs channel
detection in five sub-detection windows, assuming that results of
the detection obtained after performing channel detection on
sub-detection window 1, sub-detection window 2, sub-detection
window 4, and sub-detection window 5 indicate that channels are
idle, the result of the detection obtained after performing channel
detection on the sub-detection window 3 indicates that the channel
is occupied (shown by x), the communication device transmits a
target signal on sub-transmission resources 1, sub-transmission
resources 2, sub-transmission resources 4 and sub-transmission
resources 5, instead of transmitting a target signal on
sub-transmission resource 3.
[0065] Further, as shown in FIG. 5, if the sub-detection window 1
is used to perform channel detection on a channel in direction 1,
the sub-detection window 2 is used to perform channel detection on
a channel in direction 2, and the sub-detection window 3 is used to
perform channel detection on a channel in direction 3, the
sub-detection window 4 is used to perform channel detection on a
channel in direction 4, and the sub-detection window 5 is used to
perform channel detection on a channel in direction 5. The
communication device performs channel detection on the
sub-detection window 1, the sub-detection window 2, the
sub-detection window 4 and the sub-detection window 5 and obtained
results of the detection indicate that the channels are idle, the
communication device transmits a target signal in the direction 1
(or a beam corresponding to direction 1) using sub-transmission
resource 1, transmits a target signal in direction 2 (or a beam
corresponding to direction 2) using sub-transmission resource 2,
transmits a target signal in direction 4 (or a beam corresponding
to direction 4) using sub-transmission resource 4, and transmits a
target signal in direction 5 (or a beam corresponding to direction
5) using sub-transmission resource 5.
[0066] As shown in FIG. 5, there is a time interval between two
adjacent sub-transmission resources, and the time interval can be
used to transmit a padding signal, and the padding signal may be,
for example, some noise signals, so as to occupy transmission
resources in advance for subsequent transmission of the target
signal. The padding signal and the target signal may use the same
precoding. In addition, when a sub-detection window corresponding
to a sub-transmission resource is used to perform channel detection
in a certain direction, the padding signal before the
sub-transmission resource is also transmitted in the direction. For
example, the padding signal transmitted in a time interval between
sub-transmission resource 1 and sub-transmission resource 2 is
transmitted in direction 2 along with the target signal transmitted
on the sub-transmission resource 2.
[0067] It should be illustrated that, without conflict, the
embodiments described in the disclosure and/or the technical
features in each embodiment can be arbitrarily combined with each
other, and the technical solution obtained after the combination
should also fall within the scope of protection of the
disclosure.
[0068] It should be understood that in various embodiments of the
present disclosure, the values of the sequence numbers of the above
processes does not mean that an execution order, and an execution
order of each process should be determined by the function and
inherent logic thereof, and should not constitute a limit to the
implementation process of the embodiments of the disclosure.
[0069] The communication method according to the embodiment of the
disclosure is described in detail above. The device according to
the embodiment of the disclosure will be described below in
conjunction with FIG. 6 to FIG. 8. The technical features described
in the method embodiment are applicable to the following device
embodiments.
[0070] FIG. 6 is a schematic block diagram of a communication
device 60 according to an embodiment of the disclosure. As shown in
FIG. 6, the communication device 600 includes a processing unit 610
and a transceiver unit 620.
[0071] The processing unit 610 is configured to determine a channel
detection window and a signal transmission window. The channel
detection window is located before the signal transmission window
in the time domain. The channel detection window includes N
sub-detection windows, and the signal transmission window includes
M sub-transmission resources. The first sub-detection window of the
N sub-detection windows corresponds to the first sub-transmission
resource of the M sub-transmission resources, N and M are positive
integers and N.gtoreq.2, M.gtoreq.2.
[0072] The processing unit 610 is further configured to perform
channel detection in the first sub-detection window.
[0073] The transceiver unit 620 is configured to transmit a target
signal in the first sub-transmission resource in response to that a
result of the channel detection in the first sub-detection window
indicates that the channel is idle.
[0074] Since the channel detection window includes multiple
sub-detection windows for respectively performing channel detection
on multiple signals to be transmitted, and the communication device
transmits multiple signals in corresponding sub-transmission
resources in the signal transmission window after the channel
detection window based on a result of the detection, thereby
ensuring effective transmission of high-priority signals while
ensuring fairly using spectrum resources by communication systems
on the unlicensed frequency spectrum.
[0075] It can be seen that even if there is no time interval for
channel detection between the transmission resources used by the
multiple signals to be transmitted or the time interval is not
enough to perform channel detection, the method described in the
embodiments of the disclosure can still effectively realize
effective channel detection for multiple consecutive signals.
[0076] Optionally, M=N, the first sub-detection window is an i-th
sub-detection window arranged of the N sub-detection windows
arranged in chronological order, and the first sub-transmission
resource is an i-th sub-transmission resource of the M
sub-transmission resources arranged in chronological order, i is a
positive integer, and 1.ltoreq.i.ltoreq.N.
[0077] Optionally, M=N, the first sub-detection window is an i-th
sub-detection window of the N sub-detection windows arranged in
chronological order, and the first sub-transmission resource is an
i-th sub-transmission resource of the M sub-transmissions resources
arranged in reverse chronological order, i is a positive integer
and 1.ltoreq.i.ltoreq.N.
[0078] Optionally, the N sub-detection windows are continuous in
the time domain.
[0079] Optionally, the M sub-transmission resources further include
a second sub-transmission resource adjacent to the first
sub-transmission resource, and the first sub-transmission resource
and the second sub-transmission resource are continuous or
discontinuous in the time domain.
[0080] Optionally, the first sub-transmission resource and the
second sub-transmission resource are discontinuous in the time
domain, and the second sub-transmission resource is located before
the first sub-transmission resource in the time domain, the
transceiver unit 620 is further configured to transmit a padding
signal in a time interval between the second sub-transmission
resource and the first sub-transmission resource. The padding
signal and the target signal use the same precoding.
[0081] Optionally, the processing unit 610 is configured to perform
channel detection on a channel in a first direction within the
first sub-detection window. The transceiver unit 620 is configured
to transmit a target signal in the first direction in the first
sub-transmission resource in response to that a result of the
channel detection on the channel in the first direction within the
first sub-detection window indicates that the channel is idle.
[0082] Optionally, if the result of the channel detection within
the first sub-detection window indicates that the channel is
occupied, the transceiver unit 620 does not transmit the target
signal in the first sub-transmission resource.
[0083] Optionally, the target signal is one of signals as follows:
a synchronization signal block SSB, a channel state indication
reference signal CSI-RS, and a sounding reference signal SRS.
[0084] Optionally, the communication device is a network device or
a terminal device.
[0085] It should be understood that the communication device 600
may perform the operations performed by the communication device in
the above method 400, which is not described repeatedly here
anymore for the sake of brevity.
[0086] FIG. 7 is a schematic structural diagram of a communication
device 700 according to an embodiment of the disclosure. As shown
in FIG. 7, the communication device includes a processor 710, and
the processor 710 can call and run a computer program from a memory
to implement the method in the embodiments of the disclosure.
[0087] Optionally, as shown in FIG. 7, the communication device 700
may further include a memory 720. The processor 710 can call and
run a computer program from the memory 720 to implement the method
in the embodiments of the disclosure.
[0088] The memory 720 may be a separate device independent of the
processor 710, or may be integrated in the processor 710.
[0089] Optionally, as shown in FIG. 7, the communication device 700
may further include a transceiver 730, and the processor 710 may
control the transceiver 730 to communicate with other devices. The
processor 710 may control the transceiver 730 to send information
or data to other devices, or receive information or data sent by
other device.
[0090] The transceiver 730 may include a transmitter and a
receiver. The transceiver 730 may further include antennas, and the
number of antennas may be one or more.
[0091] Optionally, the communication device 700 may be a network
device according to an embodiment of the disclosure, and the
communication device 700 may implement the corresponding processes
implemented by the network device in each method of the embodiment
of the disclosure, which are not described repeatedly herein for
clarity.
[0092] Optionally, the communication device 700 may be a terminal
device according to an embodiment of the disclosure, and the
communication device 700 may implement the corresponding processes
implemented by the terminal device in each method of the embodiment
of the disclosure, which are not described repeatedly herein for
clarity.
[0093] FIG. 8 is a schematic structural diagram of a chip according
to an embodiment of the disclosure. The chip 800 shown in FIG. 8
includes a processor 810, and the processor 810 may call and run a
computer program from a memory to implement the method in the
embodiment of the disclosure.
[0094] The memory 820 may be a separate device independent of the
processor 810, or may be integrated in the processor 810.
[0095] Optionally, the chip 800 may further include an input
interface 830. The processor 810 can control the input interface
830 to communicate with other devices or chips. The processor 810
may control the input interface 830 to obtain information or data
sent by other devices or chips.
[0096] Optionally, the chip 800 may further include an output
interface 840. The processor 810 can control the output interface
84 to communicate with other devices or chips. The processor 810
may control the output interface 840 to output information or data
to other devices or chips.
[0097] Optionally, the chip may be applied to the network device in
the embodiment of the disclosure, and the chip may implement the
corresponding processes implemented by the network device in each
method of the embodiment of the disclosure, which are not described
repeatedly herein for clarity.
[0098] Optionally, the chip may be applied to the terminal device
in the embodiment of the disclosure, and the chip can implement the
corresponding processes implemented by the terminal device in each
method of the embodiment of the disclosure, which are not described
repeatedly herein for clarity.
[0099] It should be understood that the chips in the embodiments of
the disclosure may also be referred to as system-on-chips, system
chips, chip systems, or system-on-chip chips.
[0100] The processor described above may be a general-purpose
processor, a digital signal processor (DSP), a field programmable
gate array (FPGA), an application specific integrated circuit
(ASIC), or other programmable logic devices, transistor logic
devices, discrete hardware components etc. The aforementioned
general-purpose processor may be a microprocessor or any
conventional processor, etc.
[0101] The memory described above may be a volatile memory or a
non-volatile memory, or may include both the volatile memory and
the non-volatile memory. The non-volatile memory may be a read-only
memory (ROM), a programmable ROM (PROM), an erasable PROM, (EPROM),
an electronically EPROM (EEPROM) or a flash memory. The volatile
memory may be a random access memory (RAM).
[0102] It should be understood that the foregoing memory is
exemplary but not restricted. For example, the memory in the
embodiments of the disclosure may also be a static RAM (SRAM), a
dynamic RAM (DRAM), a synchronous DRAM (SDRAM), a double data rate
SDRAM (DDR SDRAM), an enhanced SDRAM (ESDRAM), a synch link DRAM
(SLDRAM) and a direct rambus RAM (DR RAM) or the like. That is to
say, the memory in the embodiments of the disclosure is intended to
include but is not limited to these and any other suitable types of
memories.
[0103] It should be understood that in the embodiment of the
disclosure, "B corresponding to A" means that B is associated with
A, and B can be determined according to A. However, it also should
be understood that determining B based on A does not mean
determining B only based on A, and may also mean determining B
based on A and/or other information.
[0104] Those of ordinary skill in the art may realize that units
and algorithm steps of the examples described in conjunction with
the embodiments disclosed herein may be implemented by electronic
hardware or a combination of computer software and electronic
hardware. Whether the functions are executed in hardware or
software depends on a specific application and design constraints
of the technical solution. Professional technicians can use
different methods to implement the described functions for each
specific application, but such implementation should not be
considered beyond the scope of the disclosure.
[0105] Those skilled in the art can clearly understand that, for
the convenience and conciseness of the description, regarding
specific operation processes of the system, device and unit
described above, reference may be made to the corresponding
processes in the foregoing method embodiments, which are not be
repeated here.
[0106] In the several embodiments provided in the disclosure, it
should be understood that the disclosed system, device, and method
may be implemented in other ways. For example, the device
embodiments described above are only schematic. For example, the
division of the unit is only a division of logical functions. In
actual implementation, there may be another division manner, for
example, multiple units or components may be combined or may
integrated into another system, or some features can be ignored, or
not implemented. In addition, the displayed or discussed mutual
coupling or direct coupling or communication connection may be
indirect coupling or communication connection through some
interfaces, devices or units, and may be in electrical, mechanical
or other forms.
[0107] The units described as separate components may be or may not
be physically separated, and the components displayed as units may
be or may not be physical units, that is, the components may be
located in one place, or may be distributed in multiple network
units, a part or all of the units may be selected according to
actual needs to achieve the purpose of the solution of this
embodiment.
[0108] In addition, the functional units in each embodiment of the
disclosure may be integrated into one processing unit, or each unit
may exist alone physically, or two or more units may be integrated
into one unit.
[0109] If the functions are implemented in the form of software
functional units and sold or used as independent products, the
functions can be stored in a computer-readable storage medium.
Based on such an understanding, the essential parts of the
technical solutions of the disclosure, or parts of the technical
solutions of the disclosure making contributions to the
conventional art, or part of the technical solution of the
disclosure may be embodied in form of software product, and the
computer software product is stored in a storage medium, and
includes several instructions configured to enable a computer
device (which may be a personal computer, a server, a network
device or the like) to execute all or a part of the method in each
embodiment of the disclosure. The above storage medium includes:
various media capable of storing program codes such as a U disk, a
mobile hard disk, a Read Only Memory (ROM), a random access memory
(RAM), a magnetic disk or an optical disk.
[0110] The foregoing is only the specific embodiments of the
disclosure and not intended to limit the scope of protection of the
disclosure. Any variations or replacements apparent to those
skilled in the art within the technical scope disclosed by the
disclosure shall fall within the scope of protection of the
disclosure. The scope of protection of the disclosure should
conform to the scope of protection of the claims.
* * * * *